PT-2026-115659 · Mailu · Mailu

CVE-2026-86009

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Published

2026-10-16

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Updated

2026-10-16

CVSS v4.0

8.2

High

VectorAV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Mailu is a mail server distributed as a set of Docker images. Prior to f05aeb8322e2f61096af6b089d61ba6f40587d96, domain managers can enable spoofing for hosted domains they do not control. A potentially malicious domain administrator enables spoofing for another hosted domain and can send emails that are authenticated with DKIM/SPF for domains they should not be able to. This vulnerability is addressed by f05aeb8322e2f61096af6b089d61ba6f40587d96.

Fix

Incorrect Authorization

Improper Authorization

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Weakness Enumeration

CWE-863CWE-285

Related Identifiers

CVE-2026-86009

Affected Products

Mailu